Question

why is crystallization techniques better than evaporation​

Answer 1

Answer:

Crystallisation is better than evaporation because during Evaporation. Some solids decompose or some, like sugar, may get charred on heating to dryness. Some impurities may remain dissolved in the solution even after filtration which on evaporation contaminates the solid.

Answer 2

Answer:

Crystallisation technique for purification is better than evaporation because Crystallisation does not require very high temperature conditions, there is no need to the boil the solvent.In evaporation allow the solution to heat to make the solvent evaporate but this may degrade the solute into the some another compound.

I hope it's helps you.